> Date: Mon, 23 May 2016 08:08:19 +0200
> From: for...@gimpusers.com
> To: email@example.com
> CC: notificati...@gimpusers.com
> Subject: [Gimp-user] Image diffenernt after saving
> I forgot to say that, but it is not really tansparent, Privot takes the bottom
> right (or left, I'm not sure) pixel and makes all of this color tansparent. So
> in GIMP 2 it is white, and in Privot tansparent, with the bug as shown in the
> image. But yes I will try that with the eraser tool, thanks for your answer.
Okay. Then the problem is that your background color isn't a solid white but
actually several (subtly) different shades, and even a +/-1 difference in a
pixel's RGB values may dictate whether Pivot treats it as opaque or transparent.
How to fix it remains largely the same in concept, but the execution will be
slightly different. And there are several ways, depending on exactly what you
For example, take the Paintbrush (or Pencil tool) and pick a fairly hard-edged
brush shape, set GIMP's foreground color to your desired background color, then
start painting around the background spaces of your image. This will ensure
that the background really IS a single solid RGB value and not a mix of hues or
This can also be somewhat automated:
- Switch to the Fuzzy Select tool and on its tool options, specify a small
threshold value (say, 8-16 range) and disable the antialiasing and feathering
- Click somewhere in your desired background area. This will highlight all
contiguous regions whose color is within the threshold of the pixel you clicked.
- FIll the area with a solid color (e.g. Edit > Fill with FG/BG color, or Paint
bucket tool with "fill whole selection" option set).
But automatic tools never yield a truly perfect solution -- you'll only get
that from manual effort.
By the way, since you mentioned how Pivot uses a 'chroma key' system, I'd
recommend picking a color that is obviously not a normal part of the image
(e.g. a pure RGB primary or secondary) and painting the image's background with
THAT. This will eliminate any ambiguity about which pixels are intended to be
opaque or transparent in Pivot, because only your key color will be rendered
Numbers may not lie, but neither do they tell the whole truth.
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